The Nyquist plot can be used to infer the number of unstable poles of the closed-loop system as , where is the number of unstable poles of the open-loop system, and is the number of clockwise encirclements of the point .»

The Nyquist plot can be used to infer global exponential stability of linear systems with nonlinear feedback , where satisfies a sector constraint when . The closed-loop system is stable if , where is the number of clockwise encirclements of the disk , and is the number of open-loop unstable poles.»